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Featured researches published by Haisar E. Dao.


Journal of Trauma-injury Infection and Critical Care | 2012

Cervical Spine Injuries and Helmet Laws: A Population-Based Study

Haisar E. Dao; Justin Lee; Reza Kermani; Christian Minshall; Evert A. Eriksson; Ronald I. Gross; Andrew R. Doben

BACKGROUND: To assess the incidence of cervical spine (C-spine) injuries in patients admitted after motorcycle crash in states with mandatory helmet laws (MHL) compared with states without helmet laws or selective helmet laws. METHODS: The Nationwide Inpatient Sample from the Healthcare and Utilization Project for the year 2008 was analyzed. International Classification of Diseases and Health Related Problems, Ninth Edition codes were used to identify patients with a diagnosis of motorcycle crash and C-spine injuries. National estimates were generated based on weighted analysis of the data. Outcome variables investigated were as follows: length of stay (LOS), in-hospital mortality, hospital teaching status, and discharge disposition. States were then stratified into states with MHL or selective helmet laws. RESULTS: A total of 30,117 discharges were identified. Of these, 2,041 (6.7%) patients had a C-spine injury. Patients in MHL states had a lower incidence of C-spine injuries (5.6 vs. 6.4%; p = 0.003) and less in-hospital mortality (1.8 vs. 2.6%; p = 0.0001). Patients older than 55 years were less likely to be discharged home (57.5% vs. 72.5%; p = 0.0001), more likely to die in-hospital (3.0% vs. 2.1%; p = 0.0001), and more likely to have a hospital LOS more than 21 days (7.7% vs. 6.2%; p = 0.0001). CONCLUSION: Patients admitted to the hospital in states with MHLs have decreased rate of C-spine injuries than those patients admitted in states with more flexible helmet laws. Patients older than 55 years are more likely to die in the hospital, have a prolonged LOS, and require services after discharge. LEVEL OF EVIDENCE: III.


Diseases of The Colon & Rectum | 2013

A practical mortality risk score for emergent colectomy.

Reza Kermani; Joseph J. Coury; Haisar E. Dao; Justin Lee; Peter E. Miller; Darrick Yee; Charles Contant; Alan W. Hackford

BACKGROUND: Critically ill patients requiring emergent colectomy have significant mortality risk. OBJECTIVE: A national administrative database was used to compose a simple scoring scheme for predicting in-hospital mortality risk. DESIGN: The 2007 to 2009 Nationwide Inpatient Sample was queried to identify patients requiring nonelective colectomy. Multivariable binary logistic regression analysis was used to identify predictors that increased mortality. Each predictor was given a point value, based on the corresponding logit, the sum of which constituted a risk score. The scoring system was tested by using k-partitions cross-validation. SETTINGS: This study is based on database analysis. PATIENTS: A total of 338,348 cases were identified. Mean age was 64, and 53% of the patients were women. MAIN OUTCOME MEASURES: The primary outcomes measured were mortality and risk score development. RESULTS: The overall mortality risk was 9%. Regression analysis identified the following risk factors and assigned points: acute renal failure (6), hemodialysis (6), age >65 (4), peripheral vascular disease (4), myocardial infarction (4), chronic obstructive pulmonary disease (2), cardiac arrhythmia (1), and congestive heart failure (1). The maximum score observed was 26 (of a possible 28), which corresponded to 100% mortality. Receiver operator characteristic analysis showed an area under the curve of 0.81. LIMITATIONS: This study was limited because of its retrospective nature, and because it used database data with variability in coding among participating institutions. CONCLUSIONS: With the use of a simple 8-variable scoring system, inpatient mortality estimates can be made for patients requiring emergent colectomy. When used judiciously, it can be used as a tool when counseling patients and family both before and after surgery.


Jsls-journal of The Society of Laparoendoscopic Surgeons | 2015

Stenting for obstructing colon cancer: fewer complications and colostomies.

Allan Mabardy; Peter E. Miller; Rachel Goldstein; Joseph J. Coury; Alan W. Hackford; Haisar E. Dao

Background and Objectives: Colonic stenting has been used in the setting of malignant obstruction to avoid an emergent colectomy. We sought to determine whether preoperative placement of a colonic stent decreases morbidity and the rate of colostomy formation. Methods: Cases of obstructing sigmoid, rectosigmoid, and rectal cancer from January 1, 2010, to December 31, 2011, were identified in the Nationwide Inpatient Sample (NIS) database. All patients were treated at hospitals in the United States, and the database generated national estimates. Postoperative complications, mortality, and the rate of colostomy formation were analyzed. Results: Of the estimated 7891 patients who presented with obstructing sigmoid, rectosigmoid, or rectal cancer necessitating intervention, 12.1% (n = 956) underwent placement of a colonic stent, and the remainder underwent surgery without stent placement. Of the patients who underwent stenting, 19.9% went on to have colon resection or stoma creation during the same admission. Patients who underwent preoperative colonic stent placement had a lower rate of total postoperative complications (10.5% vs 21.7%; P < .01). There was no significant difference in mortality (4.7% vs 4.2%; P = .69). The rate of colostomy formation was more than 2-fold higher in patients who did not undergo preoperative stenting (42.5% vs 19.5%; P < .01). Preoperative stenting was associated with increased use of laparoscopy (32.6% vs 9.7%; P < .01). Conclusions: Our study characterizes the national incidence of preoperative placement of a colonic stent in the setting of malignant obstruction. Preoperative stent placement is associated with lower postoperative complications and a lower rate of colostomy formation. The results support the hypothesis that stenting as a bridge to surgery may benefit patients by converting an emergent surgery into an elective one.


Annals of Plastic Surgery | 2011

Racial and socioeconomic disparities in reduction mammoplasty: an analysis of nationwide inpatient sample database

Marisa H. Amaral; Haisar E. Dao; Joseph H. Shin

The American Society of Plastic Surgery recently recorded a decline in numbers of breast reductions, one of the most common procedures performed by plastic surgeons. The purpose of this study is to characterize the reduction mammoplasty patient population which would further assist in planning the future workforce needs. Using the Nationwide Inpatient Sample database for 2007, a &khgr;2 analysis of female in-patients treated with reduction mammoplasty for breast hypertrophy was performed to identify significant differences in race and payer mix. Of 8394 female in-patients with breast hypertrophy, 61% were treated with reduction mammoplasty. Black and Hispanic patients (P < 0.0001) and patients with private insurance (P < 0.0001) were more likely to undergo reduction mammoplasty. This study demonstrates racial and socioeconomic disparities in breast reduction in the United States in 2007. With the pending institution of universal healthcare, it is predicted that disparities revealed may worsen due to cost containment pressures.


Journal of The American College of Surgeons | 2016

Comparison of 30-Day Postoperative Outcomes after Laparoscopic vs Robotic Colectomy

Peter E. Miller; Haisar E. Dao; Nivedh Paluvoi; Matthew B. Bailey; David A. Margolin; Nishit Shah; H. Vargas


Surgical Endoscopy and Other Interventional Techniques | 2012

Gallbladder damage control: compromised procedure for compromised patients

Justin Lee; Peter E. Miller; Reza Kermani; Haisar E. Dao; Kevin O’Donnell


Journal of The American College of Surgeons | 2014

Paracolostomy Hernia Repair: Who and When?

Zachary A. Gregg; Haisar E. Dao; Steven Schechter; Nishit Shah


International Journal of Colorectal Disease | 2013

Transfer status is a risk factor for increased in-hospital mortality in patients with diverticular hemorrhage.

Haisar E. Dao; Peter E. Miller; Justin Lee; Reza Kermani; Alan W. Hackford


American Surgeon | 2014

Laparoscopic colectomy is an underused procedure for the elective management of colovesical fistulas.

Haisar E. Dao; Peter E. Miller; Bhattacharya S; Klipfel A; Vrees M; Steven Schechter


Gastroenterology | 2017

Perianal Abscess; A Common Surgical Problem with Significant Morbidity

Haisar E. Dao; Jason Kempenich; Juan Marcano; Nishit Shah; Kenneth R. Sirinek

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Christian Minshall

University of Texas Southwestern Medical Center

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Evert A. Eriksson

Medical University of South Carolina

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